A proposal to limit government spying written by tech companies

Today, eight large tech companies sent a letter to the Obama administration requesting the government put new limits on its surveillance practices. The companies have been asking the government for months to allow more transparency regarding regarding requests. This time, they're also offering a proposal for how to restrict or regulate government surveillance on citizens' data. Ed Wyatt reported this story for The New York Times, and tells Marketplace Tech what the tech companies are asking proposing.